Transaction Attribute

Hi,
I use CMT.

1. In my EJB method, I simply delete a record from the Oracle database
using sql query.Which transaction attribute would be appropriate in this
case?
I guess 'NotSupported' is appropriate as I don't have multiple sql queries
to delete.

2. Also, in the same page, when I call a single select sql query from my
EJB method, I can use 'NotSupported'.
3.When I have a simple insert / update sql query(only insert/update in one
table), I can use 'NotSupported'.

4.When I have to insert / update multiple sql queries in my EJB
method,other transaction attributes would be appropriate.

Please let me know whether the above are correct.
Thanks in advance,

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